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  <title>Document</title>
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  <script>
    async function main(){
      let p = new Promise((resolve,reject)=>{
        //resolve('OK')
        reject('Error')
      })
      //1.右侧为promise的情况
      //let res = await p;
      //2.右侧为其他类型的数据
      //let res2 = await 20
      //3.如果promise是失败的状态
      try{
        let res3 = await p;
      }catch(e){
        console.log(e)
      }
    }
    main();
  </script>

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